Re: Seeing context switch storm with 10/13 snapshot of

From: Robert Creager <Robert(dot)Creager(at)Sun(dot)com>
To: Simon Riggs <simon(at)2ndquadrant(dot)com>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, PGHackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Seeing context switch storm with 10/13 snapshot of
Date: 2005-10-20 20:59:51
Message-ID: 20051020145951.00006690@C118181.stortek.com
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On Thu, 20 Oct 2005 21:19:18 +0100
Simon Riggs <simon(at)2ndquadrant(dot)com> wrote:

> Try this to recreate the problem:
> http://archives.postgresql.org/pgsql-performance/2004-04/msg00280.php
>

Yup, that does it. Three hits the level I see with my application ~100k. Two
hits about 50k, one does nothing (< 1k).

Interesting. 7.4.1 is worse for this test, as two jump up to 130k. But, my app
runs fine against 7.4.1...

Would it still be helpful to try and pull together a test case from my app
against 8.1beta3? I have not worked on it, and don't know when I'd get time to
(since I have a work around).

Cheers,
Rob

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